BUY THE YEAR 9 PHYSICS WORKBOOK

The Relationship Between Frequency, Wavelength and Velocity

  • We saw in the lesson ‘Waves’ that the frequency, wavelength and velocity of a wave are mathematically related. Therefore, by knowing two of these quantities, we can calculate the third.
    To calculate frequency:

wave formula frequency

 

    To calculate wavelength:

wave formula wavelength

 

    To calculate velocity:

wave formula velocity

 

  • We also saw that this relationship means that frequency and wavelength are inversely proportional.
    Therefore, sound waves with lower frequencies have longer wavelengths and sound waves with higher frequencies have shorter wavelengths.

 

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